Merge pull request #85 from Web3Auth/enableMFA_enhancements

feat: enableMFA() enhancements

Author: chaitanyapotti

core/src/main/java/com/web3auth/core/Web3Auth.kt

@@ -314,6 +314,10 @@ class Web3Auth(web3AuthOptions: Web3AuthOptions) {
      */
     fun enableMFA(loginParams: LoginParams? = null): CompletableFuture<Boolean> {
         enableMfaCompletableFuture = CompletableFuture()
+        if (web3AuthResponse?.userInfo?.isMfaEnabled == true) {
+            throwEnableMFAError(ErrorCode.MFA_ALREADY_ENABLED)
+            return enableMfaCompletableFuture
+        }
         val sessionId = sessionManager.getSessionId()
         if (sessionId.isBlank()) {
             throwEnableMFAError(ErrorCode.NOUSERFOUND)

core/src/main/java/com/web3auth/core/types/Web3AuthError.kt

@@ -25,6 +25,9 @@ object Web3AuthError {
             ErrorCode.INVALID_LOGIN -> {
                 "Invalid Login"
             }
+            ErrorCode.MFA_ALREADY_ENABLED -> {
+                "MFA already enabled"
+            }
         }
     }
 }
@@ -36,5 +39,6 @@ enum class ErrorCode {
     RUNTIME_ERROR,
     APP_CANCELLED,
     SOMETHING_WENT_WRONG,
-    INVALID_LOGIN
+    INVALID_LOGIN,
+    MFA_ALREADY_ENABLED
 }